Question about 1995 Honda Odyssey

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How to check/determine a defective oxygen sensor?

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Only can be done with a diagnostic scan tool/lab scope. or at least that is how I was trained/taught

Posted on Jul 11, 2009

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2001 nissan maxima code p0155 ses light will not stay off. repaired the issue with the code.


  • Defective Oxygen Sensor/Air Fuel Ratio Sensor Heater element(s)
  • Defective Oxygen Sensor/Air Fuel Ratio Sensor Heater circuit
  • Defective Engine Coolant Temperature Sensor
  • Defective sensor wiring and/or circuit problem
  • Defective Oxygen Sensor/Air Fuel Ratio Sensor Heater Relay or Fuse
  • PCM software needs to be updated
  • Defective PCM

Aug 29, 2017 | Nissan Cars & Trucks

2 Answers

Check engine light is on and i got error code p1133. what is that?


Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
- Vacuum leak
- Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 harness is open or shorted
- Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 circuit poor electrical connection

The Powertrain Control Module (PCM) monitors the Heated Oxygen Sensor (HO2S) activity for 90 seconds after closed loop operation has begun. The PCM determines if the front HO2S is functioning properly by counting the number of HO2S-1 Lean/Rich (L/R) and Rich/Lean (R/L) switches.

If the Powertrain Control Module (PCM) determines that the front HO2S did not switch enough times, the PCM will set the P1133 code.

replace the o2 sensor

I’m happy to assist further over the phone at https://www.6ya.com/expert/brock_d67526d2a834c47e

Dec 14, 2013 | 2006 Saturn Vue 2.2

1 Answer

Check engine light is on, says oxygen sensor


No it doesn't say O2 sensor it says a problem exists in the O2 sensor circuit. The diagnostics must be done to determine the actual failed part.

Oct 16, 2012 | 1991 Ford F150

1 Answer

1995 honda odyssey starting problems


Hello! in 1995 stored trouble codes used the On Board Diagnostic I software (OBDI)..Scanners will not work...The control unit LED can indicate any number of simultaneous component conditions by blinking separate codes, one after another...An instrument panel mounted indicator lamp will light and stay lit. If the lamp is on, or if a system malfunction is suspected even though the lamp is off, it is necessary to inspect the electronic control unit LED display. The LED display is on the ECM (ECU), which is located just below the RH side of the instrument panel. The indicator lamps operate whenever the ignition is On and a DTC is stored in the ECM (ECU) memory.
When an abnormality is detected the ECM (ECU) display blinks. The LED blinks a certain number of times, with the number of blinks indicating the number of the DTC. After the LED blinks a number of times there will be a two second pause and the LED will blink out the number of the next DTC..here are the codes..If there is a code send it to me...If there isn't a code I'll take it from there...guru.saailer

CODE DEFINITION
1 ..Oxygen Sensor "A" (Primary) defective circuit or unplugged / defective sensor

2.. Oxygen Sensor "B" defective circuit or unplugged / defective sensor

3 ...MAP Sensor (Manifold Absolute Pressure) defective circuit or unplugged / defective sensor

4... CKP Sensor (Crankshaft Position Sensor) defective circuit or unplugged / defective sensor

5.. MAP Sensor (Manifold Absolute Pressure) mechanical problem / disconnected piping
* not 94-95

6... ECT Sensor (Engine Coolant Temperature) defective circuit or unplugged / defective sensor

7... TP Sensor (Throttle Position) defective circuit or unplugged / defective sensor

8... TDC Sensor (Top Dead Center) defective circuit or unplugged / defective sensor

9... CYP Sensor (Cylinder) defective circuit or unplugged / defective sensor
* invalid code for throttle body injection Hondas
** invalid code for V6 engines

10.. IAT Sensor (Intake Air Temperature) defective circuit or unplugged / defective sensor

12... EGR Lift Sensor (Exhaust Gas Recirculation) defective circuit or unplugged / defective sensor
* invalid code for non-equipped EGR valve vehicles

13... BARO Sensor (Atmospheric Pressure) defective circuit or unplugged / defective sensor

14... IAC Valve (Idle Air Control) defective circuit or unplugged / defective sensor

15... Ignition Output Signal missing or defective ignition output signal

16... Fuel Injector System defective circuit or unplugged / defective fuel injector

17... VSS (Vehicle Speed Sensor) defective circuit or unplugged / defective sensor

19...Automatic Transmission Lock Up Control Solenoid Valve defective circuit or unplugged / defective solenoid valve

20 ..Electrical Load Detector defective circuit or unplugged / defective sensor

21... VTEC Solenoid Valve defective circuit or unplugged / defective solenoid valve
* invalid code for non-VTEC engine
** invalid for V6 engine

22... VTEC Oil Pressure Switch defective circuit or unplugged / defective oil pressure switch
* invalid code for non-VTEC engine

23... KS (Knock Sensor) defective circuit or unplugged / defective sensor
* invalid code for V6 engine

30... Automatic Transmission Signal: "A" / SEAF / SEFA / TMA or TMB defective circuit or unplugged / defective sensor
* invalid code for 1996

31... Automatic Transmission Signal "B" defective circuit or unplugged / defective sensor

41... Primary Oxygen Sensor - Heater circuit malfunction

43... Fuel Supply System defective or malfunctioning fuel supply system

45... System Too Lean or Too Rich malfunction in the fuel monitoring systems

48... LAF Sensor (Lean Air Fuel) defective circuit or unplugged / defective sensor

54... CKF Sensor (Crankshaft Speed Fluctuation) defective circuit or unplugged / defective sensor

61... Oxygen Sensor, Heated - Sensor 1 (Primary) high voltage, low voltage, or slow response

63... Oxygen Sensor, Heated - Sensor 2 (Secondary) high voltage, low voltage, or slow response

65... Oxygen Sensor Heater (Secondary) malfunctioning or defective oxygen sensor heater

67... Catalyst system Efficiency Below Threshold malfunctioning or defective catalyst system

70... Automatic Transmission malfunction with the automatic transmission controls

71... Cylinder 1 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire

72... Cylinder 2 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire

73... Cylinder 3 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire

74... Cylinder 4 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire

80... Exhaust Gas Recirculation insufficient flow detected

86... ECT Sensor (Engine Coolant Temperature) circuit range / performance problem

90... Evaporative Emission Control System leak detected in the fuel tank area

91... Fuel Tank Pressure Sensor low input

92... Evaporative Emission Control System insufficient purge flow

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Dec 28, 2011 | 1996 Honda Accord

1 Answer

Check engine light on- auto zone scanner shows error code p0053 probable cause: 1.-check circuit fuse 2.-relay defective 3.-check circuit wiring Where are fuse and relay located?


The code P0053 is for your Bank 1 Oxygen Sensor, the closest Oxygen Sensor to the engine, connected to the Exhaust. Replace your Oxygen Sensor, clear the code, and see if it comes back.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

Mar 12, 2011 | Chevrolet Suburban 1500 Cars & Trucks

2 Answers

After going over 40mph the check engine light goes on n it gives the code 440


How did you read that code on your car? A 92 Accord is supposed to give you pre-OBD honda codes, which are all below 100. Please check the code again and re-post it.

Jan 04, 2011 | 1992 Honda Accord

2 Answers

Hi, I need to take my 2001 Mazda 626 4cyln for SMOG check in CA. But its check engine light is on, diagnosed as code P0421. Appreciate your help to fix this problem, or just to pass the check. Thank you.


CODE P0421. DEFINITION-CATALYST EFFICIENCY LOW-BANK 1. EXPLANATION-THE OXYGEN SENSORS MONITOR THE CATALYTIC CONVERTERS ABILITY TO STORE OXYGEN. PROBLEM CAUSES- 1. CATALYTIC CONVERTER DEFECTIVE (FAILURE POSSIBLY DUE TO #2,3, OR 4) 2. ENGINE MISFIRE OR RUNNING CONDITION. 3. LARGE VACCUM LEAK 4. ENGINE OIL LEAKAGE INTO EXHAUST-VALVE GUIDE SEALS, PISTON RINGS. THE PCM HAS DETERMINED THAT THE WARM UP CATALYST EFFICIENCY FOR BANK 1 IS BELOW TRESHOLD FOR THE CURRENT ENGINE OPERATING CONDITION. (BANK 1 IDENTIFIES THE LOCATION OF CYLINDER #1, WHILE BANK 2 IDENTIFIES THE CYLINDERS ON THE OPPOSITE BANK).

replace O2 sensors, or your Catalytic Converter.

Oct 06, 2010 | Mazda 626 Cars & Trucks

1 Answer

How do i determine which 02 sensor is defective? i've gotten a p0171 dtc and im not sure which sensor should be replaced


P0171 is not a defective sensor, it is the bank 1 (irrelivant) senor that has sensed a lean mixture... in other words too much oxygen in the exhaust.
This is usually a MAFS or MAP fault but it can be a leaking inlet gasket or simply a vac pipe disconnected.

Dony change an o2 sensor, they are working fine

Sep 11, 2010 | 2003 Chevrolet Impala

1 Answer

Oxygen sensor codes I have 2 codes PO133 and PO141 says possible defective sensor or faulty HO2S12 or poor connections


Well it could be the wiring too the sensor, a software issue that requires flashing the pcm or the sensor you purchased is not working too the same standards that the old one was. Did you use a one type fit alls 02 sensor that uses the old connector and you have to splice the wires? Read this info...


P0133 - Oxygen Sensor Circuit Slow Response (Bank1, Sensor1)

What does that mean?
This involves the front oxygen sensor on Bank 1. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.

Symptoms:
You will likely not notice any drivability problems, although there may be symptoms.

Causes:
A code P0133 may mean that one or more of the following has happened:
* The oxygen sensor is faulty
* The wiring to the sensor is broken / frayed
* There is an exhaust leak

Possible Solutions:
The simplest thing to do is to reset the code and see if it comes back.

If the code comes back, the problem is more than likely the front Bank 1 oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:
* Check and fix any exhaust leaks
* Check for wiring problems (shorted, frayed wires)
* Check the frequency and amplitude of the oxygen sensor (advanced)
* Check for a deteriorating / contaminated oxygen sensor, replace if necessary
* Check for inlet air leaks
* Check the MAF sensor for proper operation



P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)

What does that mean?
This code means that the heated circuit in the oxygen sensor on bank 1 decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0141. See also: P0135 (Bank 1, Sensor 1).

Symptoms:
You will likely notice poor fuel economy the illumination of the Check Engine Light.

Causes:
A code P0141 may mean that one or more of the following has happened:
* open or short to ground in the wiring harness
* O2 heater circuit wiring high resistance
* O2 heater element resistance is high
* Internal short or open in the heater element

Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed converter.

Possible Solutions:
* Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
* Repair short or open or high resistance in wiring harness or harness connectors


Hope helps (remember rated and comment this).

Jul 01, 2010 | 2000 Pontiac Sunfire

1 Answer

Check engine light


P0041 Downstream Oxygen Sensors Swapped From Bank To Bank
How does a P0041 code trigger the check engine light? This code will trigger the light to come on under the following condition:

The Heated Oxygen Sensor Monitor, a strategy built into the computer, determines if the Heated Oxygen Sensor (HO2S) signal response for a change in fuel trim corresponds to the correct engine bank. If a response from the Oxygen Sensor being tested is not indicated, a trouble code will be set and the MIL (Malfunction Indicator Lamp) will illuminate.
Possible Causes:
Crossed Heated Oxygen Sensor harness connectors
Wiring swapped from one Oxygen Sensor connector to the other
Wiring changed at the computer connection or in the related harness

Apr 09, 2009 | 1994 Honda Civic

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